“The song (Ancient Heart) itself, which swings between some appetizingly heavy progressive riffs and aggressive growls and more melodic moments (with clean singing behind them). A tough band to place in that regard, but one certainly worth seeking out as they continue to expand their sound.” – DeadRhetoric
"KOSM does a solid job of mixing technicality, mood and groove. They have all sorts of dual guitar sections, and very psychedelic and moody parts on “Cosmonaut” as well. They’re a well versed band with all kinds of moods and changes engaging your ears every split second. " - Technical Music Review
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